So i have no idea how to do this problem. Permanant hard watee contains calcium sulfate and can be softened by adding sodium carbonate. Determine the number of moles sodium carbonate needed to react 27.2 moles of calcium sulfate.
a. Write the chemical equation
b. Balance the chemical equation​

the food using pesticides in the future will harm you by giving you diseases like cancer or something since they have things that we should not eat in it like chemicals or pesticides. that is why organic food is more expensive because they take the time to make it right and healthy for you to eat.

explanation:

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms